By how much with 比 (degree)

Structure A + 比 + B + adjective + 一点儿 / 得多 / 多了

After a 比 comparison you can specify BY HOW MUCH, at the end: 一点儿 (a bit more), 得多 / 多了 (much more). 他比我高一点儿 = "he’s a bit taller than me"; 今天比昨天热得多 = "today is much hotter than yesterday". An exact difference also goes at the end: 大两岁 ("two years older").

Examples

他tā比bǐ我wǒ高gāo一yī点diǎn儿r。
He’s a bit taller than me.
今jīn天tiān比bǐ昨zuó天tiān热rè得de多duō。
Today is much hotter than yesterday.
这zhè个ge比bǐ那nà个ge贵guì多duō了le。
This one is much more expensive than that one.

Levels are indicative: they follow the standard Chinese Grammar Wiki (AllSet Learning) progression, not an official HSK 3.0 mapping. We never assign levels by eye.

This point and the other 370, with audio on every example, inside Wanyu.